Journal
NANO LETTERS
Volume 13, Issue 4, Pages 1457-1461Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl4004283
Keywords
Radiative cooling; thermal radiation; broadband solar mirror; phonon-polariton; selective emission
Categories
Funding
- Alberta Scholarship Programs' Sir James Lougheed Award of Distinction
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If properly designed, terrestrial structures can passively cool themselves through radiative emission of heat to outer space. For the first time, we present a metal-dielectric photonic structure capable of radiative cooling in daytime outdoor conditions. The structure behaves as a broadband mirror for solar light, while simultaneously emitting strongly in the mid-IR within the atmospheric transparency window, achieving a net cooling power in excess of 100 W/m(2) at ambient temperature. This cooling persists in the presence of significant convective/conductive heat exchange and nonideal atmospheric conditions.
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